PDF malware analysis — malicious · 73e1ee786f766803

MALICIOUS

PDF

65.9 KB Created: 2020-11-17 19:16:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d6b5c64b47b2e4269ed7b854c5eae1a0 SHA-1: 90f7064001aef6e61c5486fea1546d43893a2a3f SHA-256: 73e1ee786f766803e341017509618b773f47c5997f2d2d6e30941693d435bb12

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. The document body, though partially corrupted, suggests a lure related to educational materials. The presence of multiple Weebly-hosted PDF links, along with a direct link to 'traffine.ru', indicates a probable attempt to redirect users to malicious content or phishing sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 5

Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://traffine.ru/strik?utm_term=cuaderno+de+trabajo+primer+grado+espa%25C3%25B1ol
- https://bumenabizobopum.weebly.com/uploads/1/3/4/4/134462968/bexupewepagamite.pdf
- https://nikudedixipapun.weebly.com/uploads/1/3/4/6/134692686/zuxazamox.pdf
- https://cdn-cms.f-static.net/uploads/4366007/normal_5f872451e86d4.pdf
- https://pirivelel.weebly.com/uploads/1/3/4/5/134505874/ef95877a3efddf7.pdf
- https://cdn-cms.f-static.net/uploads/4413126/normal_5faa441f89d45.pdf
- https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/todufomesobunemuz.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/jolufozo/womens_heels_in_mens_sizes.pdf
- https://s3.amazonaws.com/piwupevivotixi/xepuwarogemakidutal.pdf
- https://s3.amazonaws.com/gezejoputiwinu/pukifudotizopu.pdf
- https://s3.amazonaws.com/lixuzo/subagivuvi.pdf
- https://uploads.strikinglycdn.com/files/e9a6b77a-b6b4-477b-b873-5c7b9e83025e/18513455066.pdf
- https://s3.amazonaws.com/vawoginele/29658292459.pdf
- https://s3.amazonaws.com/widetunipet/79012606179.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000bfeb.bin` `b45a2ddc8274b5f4dc9f590c1e54119c7cfccfd5cbb2a10ba1880b812da87cad`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBFEB	5612 bytes
`font_01_sfnt_off0000d29f.bin` `f218bef9dc4731270e7054a092b81952fa0e207996b6184dd9112647c9b728a3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD29F	11700 bytes

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